Table 2.

Summarized data on the weighted means of the mechanical complications rates reported by the individual studies, according to the type of the spacer

Group	Number of spacers	Mechanical complications, % ± SD	Spacer fracture, % ± SD	Perispacer fracture, % ± SD	Spacer dislocation, % ± SD	Acetabular complications, % ± SD
Standardized preformed	798	13.8 ± 5.2	0.8 ± 2.2	1.3 ± 30.5	11.5 ± 4.3	0.3 ± 2.2
Standardized molded	301	37.2 ± 21.6	10.2 ± 6.3	13.5 ± 12	13.5 ± 6.9	0
Manually shaped	560	19.2 ± 24.7	3.7 ± 7.2	3.3 ± 5.2	9.1 ± 11.2	3.3 ± 6.9
p value	–	0.047*	0.005*	< 0.001*	0.477	0.156
Total	1659	19 ± 16.3	3.5 ± 5.9	3.5 ± 6.6	10.8 ± 7.5	1.2 ± 4.5

SD standard deviation

*Statistically significant